Bath tub



FIG. 1 is a frontal perspective view thereof;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is bottom view thereof.

FIG. 6 a right side view of thereof; and,

FIG. 7 is a left side view of thereof. 

The ornamental design for a bath tub, as shown and described. 